Device for removing interference connecting pump impeller

Abstract

The invention provides a device for removing interference connecting pump impellers. The device for removing the interference connecting pump impellers is characterized in that a water pump impeller is fixed on one end of a water pump shaft by interference connection; the water pump impeller is opened with a balance hole which is a threaded hole; the device comprises a positioning bolt, a supportplate and an ejector rod; a threaded shaft hole with periphery provided with at least two positioning holes or positioning grooves is arranged in the middle of the support plate; one end of the ejector rod is a threaded rod, while the other end of the ejector rod is provided with a force structure capable of rotating the ejector rod; the positioning bolt passes the positioning holes or the positioning grooves to be screwed into the balance hole of the water pump impeller so that the the threaded shaft hole on the support plate is aligned with the end face of the water pump shaft, and the threaded rod of the ejector rod is screwed to be in contact with the end surface of the water pump shaft from the threaded shaft hole on the support plate; the diameter of the threaded rod of the ejector rod is smaller than the diameter of the water pump shaft. The device for removing the interference connecting pump impellers has the advantages that with torque applied to the ejector rod through a lever tool, large pressure on the pump shaft can be converted; separation of the water pump shaft and the impeller is realized; operation is easy.

Description

technical field [0001] The invention relates to a device for removing an impeller of an interference-connected water pump. Background technique [0002] The interference connection between the pump shaft and the impeller is realized by using the interference fit between the parts. This connection structure is simple, the centering accuracy is good, and it can withstand torque, axial force, or the combined load of the two, and the load capacity High, and it can work more reliably under shock and vibration loads. Generally, large-scale engine cooling water pumps such as lifting machinery, ships, and locomotives use this connection. However, it is also very difficult to remove the impeller with interference connection, which will lead to great difficulty in maintenance, and it is difficult to replace the water seal located inside the impeller. In the prior art, the most direct way to remove the impeller is to use a press to press the pump shaft out of the impeller, but since t...

AI Technical Summary

Problems solved by technology

However, it is also very difficult to remove the impeller with interference connection, which will lead to difficult maintenance and difficult to replace the water seal located inside the impeller

In the prior art, the most direct way to remove the impeller is to use a press to press the pump shaft out of the impeller, but since the impeller is inside the pump body, there is no suitable position as a supporting point for the pump to bear the force. If there is no special clamp, the impeller will It cannot be disassembled, and the client usually does not have press equipment, so it does not have the conditions for disassembly and assembly at all

Once the water seal fails, the pump can only be scrapped or returned to the factory for repair, which is very expensive

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